/* roulang page: index */
:root {
      --primary: #0F172A;
      --primary-light: #1E293B;
      --accent: #06B6D4;
      --accent-hover: #0891B2;
      --secondary: #F97316;
      --secondary-hover: #EA580C;
      --bg-body: #F8FAFC;
      --bg-surface: #FFFFFF;
      --bg-subtle: #F1F5F9;
      --bg-dark: #0B0F17;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border-color: rgba(226, 232, 240, 0.9);
      --border-dark: rgba(255, 255, 255, 0.08);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-pill: 9999px;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.08);
      --container-max: 1280px;
      --transition-fast: 0.2s ease;
      --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background-color: var(--bg-body);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    button, input, select, textarea {
      font-family: inherit;
      font-size: 1rem;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 顶部辅助条与主导航 */
    .top-bar {
      background-color: var(--bg-dark);
      color: var(--text-light);
      font-size: 0.85rem;
      padding: 0.5rem 0;
      border-bottom: 1px solid var(--border-dark);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    .top-bar-info {
      display: flex;
      align-items: center;
      gap: 1.5rem;
    }
    .top-bar-info span {
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .top-bar-links a:hover {
      color: var(--accent);
    }

    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: box-shadow var(--transition-fast);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
    }
    .nav-logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--accent), var(--primary));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.15rem;
      box-shadow: 0 4px 10px rgba(6, 182, 212, 0.3);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2rem;
      list-style: none;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 0.25rem 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent-hover);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent);
      transition: width var(--transition-fast);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      font-weight: 600;
      padding: 0.7rem 1.4rem;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all var(--transition-normal);
      font-size: 0.95rem;
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(6, 182, 212, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(6, 182, 212, 0.35);
    }
    .btn-cta {
      background-color: var(--secondary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
    }
    .btn-cta:hover {
      background-color: var(--secondary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(249, 115, 22, 0.35);
    }
    .btn-outline {
      background-color: transparent;
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
    }
    .btn-outline:hover {
      background-color: rgba(255, 255, 255, 0.1);
      border-color: #FFFFFF;
      transform: translateY(-2px);
    }
    .btn-outline-dark {
      background-color: transparent;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-outline-dark:hover {
      border-color: var(--accent);
      color: var(--accent);
      transform: translateY(-2px);
    }
    .btn-sm {
      padding: 0.45rem 1rem;
      font-size: 0.875rem;
    }

    /* 移动端菜单按钮 */
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* Section 通用 */
    .section {
      padding: 5.5rem 0;
      position: relative;
    }
    .section-light {
      background-color: var(--bg-surface);
    }
    .section-subtle {
      background-color: var(--bg-subtle);
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: #F8FAFC;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 3.5rem auto;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.35rem 0.85rem;
      border-radius: var(--radius-pill);
      font-size: 0.8rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 1rem;
    }
    .badge-accent {
      background-color: rgba(6, 182, 212, 0.12);
      color: #0284C7;
      border: 1px solid rgba(6, 182, 212, 0.25);
    }
    .badge-accent-dark {
      background-color: rgba(6, 182, 212, 0.2);
      color: #38BDF8;
      border: 1px solid rgba(6, 182, 212, 0.4);
    }
    .badge-secondary {
      background-color: rgba(249, 115, 22, 0.12);
      color: #C2410C;
      border: 1px solid rgba(249, 115, 22, 0.25);
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 1.15rem;
      letter-spacing: -0.02em;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 板块一：首屏 Hero（自测选型短问卷 + 结果预览） */
    .hero-section {
      background: linear-gradient(135deg, rgba(11, 15, 23, 0.94), rgba(15, 23, 42, 0.96)), url('/assets/images/83750b1e00b9f36f.webp') center/cover no-repeat;
      color: #FFFFFF;
      padding: 5rem 0 6rem 0;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 3.5rem;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1.25rem;
      letter-spacing: -0.03em;
    }
    .hero-content h1 .highlight {
      background: linear-gradient(90deg, #38BDF8, #818CF8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.1rem;
      line-height: 1.75;
      color: #CBD5E1;
      margin-bottom: 2rem;
    }
    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
      margin-bottom: 2.5rem;
    }
    .hero-tag-item {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: rgba(255, 255, 255, 0.08);
      padding: 0.4rem 0.85rem;
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      color: #E2E8F0;
      border: 1px solid rgba(255, 255, 255, 0.12);
    }
    .hero-tag-item i {
      color: var(--accent);
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
    }

    /* 选型测评交互卡 */
    .quiz-card {
      background: rgba(30, 41, 59, 0.7);
      backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 2.25rem;
      box-shadow: var(--shadow-xl);
    }
    .quiz-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 1.5rem;
      padding-bottom: 1rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .quiz-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #F8FAFC;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .quiz-step-pill {
      font-size: 0.75rem;
      padding: 0.25rem 0.6rem;
      background: rgba(6, 182, 212, 0.2);
      color: #38BDF8;
      border-radius: var(--radius-pill);
    }
    .quiz-group {
      margin-bottom: 1.25rem;
    }
    .quiz-label {
      font-size: 0.9rem;
      color: #94A3B8;
      margin-bottom: 0.5rem;
      display: block;
      font-weight: 500;
    }
    .quiz-select {
      width: 100%;
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #F8FAFC;
      padding: 0.75rem 1rem;
      border-radius: var(--radius-sm);
      outline: none;
      transition: border-color var(--transition-fast);
    }
    .quiz-select:focus {
      border-color: var(--accent);
    }
    .quiz-result-preview {
      background: rgba(15, 23, 42, 0.6);
      border: 1px dashed rgba(6, 182, 212, 0.4);
      border-radius: var(--radius-md);
      padding: 1.25rem;
      margin: 1.25rem 0;
    }
    .quiz-result-title {
      font-size: 0.85rem;
      color: #38BDF8;
      font-weight: 600;
      margin-bottom: 0.4rem;
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .quiz-result-desc {
      font-size: 0.875rem;
      color: #CBD5E1;
      line-height: 1.5;
    }

    /* 板块二：全球覆盖与高并发遥测指标带 */
    .metrics-bar-section {
      background-color: var(--bg-surface);
      border-bottom: 1px solid var(--border-color);
      padding: 2.75rem 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .metric-card {
      text-align: center;
      padding: 1rem;
      border-right: 1px solid var(--border-color);
    }
    .metric-card:last-child {
      border-right: none;
    }
    .metric-num {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 0.35rem;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.2rem;
    }
    .metric-num .accent-unit {
      color: var(--accent);
      font-size: 1.5rem;
    }
    .metric-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 0.25rem;
    }
    .metric-sub {
      font-size: 0.825rem;
      color: var(--text-muted);
    }

    /* 板块三：核心架构与认证 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .arch-specs {
      list-style: none;
      margin: 1.5rem 0 2rem 0;
    }
    .arch-spec-item {
      display: flex;
      align-items: flex-start;
      gap: 1rem;
      margin-bottom: 1.25rem;
    }
    .arch-icon {
      width: 36px;
      height: 36px;
      border-radius: var(--radius-sm);
      background: rgba(6, 182, 212, 0.1);
      color: var(--accent-hover);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-size: 1rem;
    }
    .arch-text h4 {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 0.25rem;
    }
    .arch-text p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .arch-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }

    /* 板块四：卖点三连卡片 */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .highlight-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 2.25rem;
      transition: all var(--transition-normal);
      display: flex;
      flex-direction: column;
    }
    .highlight-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-xl);
    }
    .highlight-card-icon {
      width: 56px;
      height: 56px;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(14, 165, 233, 0.05));
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 1.5rem;
    }
    .highlight-card h3 {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
      color: var(--primary);
    }
    .highlight-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 1.5rem;
      flex-grow: 1;
    }
    .highlight-tag {
      font-size: 0.8rem;
      color: var(--accent-hover);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }

    /* 板块五：场景卡多维矩阵 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .scenario-card {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      transition: all var(--transition-normal);
      display: flex;
      flex-direction: column;
    }
    .scenario-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--accent);
    }
    .scenario-img-box {
      height: 160px;
      overflow: hidden;
      position: relative;
    }
    .scenario-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform var(--transition-normal);
    }
    .scenario-card:hover .scenario-img-box img {
      transform: scale(1.05);
    }
    .scenario-body {
      padding: 1.25rem;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .scenario-body h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      color: var(--primary);
    }
    .scenario-body p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1rem;
      flex-grow: 1;
    }
    .scenario-meta {
      font-size: 0.8rem;
      color: var(--accent-hover);
      font-weight: 600;
      border-top: 1px solid var(--border-color);
      padding-top: 0.75rem;
      display: flex;
      justify-content: space-between;
    }

    /* 板块六：核心功能六宫格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .feature-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      transition: all var(--transition-normal);
    }
    .feature-card:hover {
      border-color: var(--accent);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .feature-head {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 1rem;
    }
    .feature-icon-circle {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(15, 23, 42, 0.05);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      flex-shrink: 0;
    }
    .feature-card:hover .feature-icon-circle {
      background: rgba(6, 182, 212, 0.15);
      color: var(--accent-hover);
    }
    .feature-head h3 {
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--primary);
    }
    .feature-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块七：核心产品与工具套件对比 (报价/规格对比) */
    .suite-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      align-items: stretch;
    }
    .suite-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 2.5rem 2rem;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: all var(--transition-normal);
    }
    .suite-card.highlighted {
      border-color: var(--accent);
      box-shadow: var(--shadow-xl);
      transform: scale(1.03);
    }
    .suite-card.highlighted::before {
      content: '主力推荐';
      position: absolute;
      top: -14px;
      right: 24px;
      background: var(--accent);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.25rem 0.75rem;
      border-radius: var(--radius-pill);
    }
    .suite-name {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.5rem;
    }
    .suite-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 1.5rem;
      min-height: 44px;
    }
    .suite-price {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 1.5rem;
      padding-bottom: 1.25rem;
      border-bottom: 1px solid var(--border-color);
      display: flex;
      align-items: baseline;
      gap: 0.35rem;
    }
    .suite-price span {
      font-size: 0.875rem;
      font-weight: 500;
      color: var(--text-light);
    }
    .suite-features {
      list-style: none;
      margin-bottom: 2rem;
      flex-grow: 1;
    }
    .suite-features li {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 0.75rem;
    }
    .suite-features li i {
      color: var(--accent);
      font-size: 0.85rem;
    }

    /* 板块八：深色沉浸式技术故障排查闭环 */
    .dark-flow-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .dark-flow-steps {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    .dark-flow-step {
      display: flex;
      gap: 1.25rem;
      background: rgba(255, 255, 255, 0.03);
      padding: 1.25rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-dark);
      transition: border-color var(--transition-fast);
    }
    .dark-flow-step:hover {
      border-color: var(--accent);
    }
    .step-badge {
      width: 32px;
      height: 32px;
      border-radius: var(--radius-sm);
      background: rgba(6, 182, 212, 0.2);
      color: #38BDF8;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
      flex-shrink: 0;
    }
    .step-body h4 {
      font-size: 1.05rem;
      font-weight: 600;
      color: #F8FAFC;
      margin-bottom: 0.35rem;
    }
    .step-body p {
      font-size: 0.875rem;
      color: #94A3B8;
      line-height: 1.6;
    }
    .dark-media-card {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-dark);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }

    /* 板块九：本地化与车规合规保障条 */
    .compliance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .compliance-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem 1.25rem;
      text-align: center;
      transition: all var(--transition-fast);
    }
    .compliance-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .compliance-card i {
      font-size: 2.2rem;
      color: var(--accent);
      margin-bottom: 1rem;
    }
    .compliance-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      color: var(--primary);
    }
    .compliance-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块十：客户案例与工程验证 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .case-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 2.25rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .case-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent);
      background: rgba(6, 182, 212, 0.1);
      padding: 0.25rem 0.6rem;
      border-radius: var(--radius-sm);
      margin-bottom: 1rem;
      align-self: flex-start;
    }
    .case-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.85rem;
    }
    .case-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 1.5rem;
    }
    .case-metrics {
      display: flex;
      gap: 1.5rem;
      border-top: 1px solid var(--border-color);
      padding-top: 1.25rem;
    }
    .case-metric-item .val {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--secondary);
    }
    .case-metric-item .lbl {
      font-size: 0.75rem;
      color: var(--text-light);
    }

    /* 板块十一：行业技术动态资讯摘要 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .news-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all var(--transition-normal);
    }
    .news-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }
    .news-thumb {
      height: 190px;
      overflow: hidden;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform var(--transition-normal);
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }
    .news-info {
      padding: 1.5rem;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .news-info h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.4;
      margin-bottom: 0.75rem;
    }
    .news-info p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }
    .news-btn {
      color: var(--accent);
      font-size: 0.875rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
    }

    /* 板块十二：常见技术异议答疑 FAQ */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 1rem;
      overflow: hidden;
      transition: border-color var(--transition-fast);
    }
    .faq-item:hover {
      border-color: var(--accent);
    }
    .faq-summary {
      padding: 1.25rem 1.5rem;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--primary);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary i {
      color: var(--text-light);
      transition: transform var(--transition-fast);
    }
    details[open] .faq-summary i {
      transform: rotate(180deg);
      color: var(--accent);
    }
    .faq-content {
      padding: 0 1.5rem 1.5rem 1.5rem;
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid var(--bg-subtle);
      margin-top: 0.5rem;
      padding-top: 1rem;
    }

    /* 板块十三：全局演示预约与工程咨询表单 (强转化) */
    .consult-box {
      background: linear-gradient(135deg, #0F172A, #1E293B);
      border-radius: var(--radius-lg);
      padding: 3.5rem;
      color: #FFFFFF;
      box-shadow: var(--shadow-xl);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .consult-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .consult-text h2 {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    .consult-text p {
      font-size: 1.05rem;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 2rem;
    }
    .consult-features {
      list-style: none;
    }
    .consult-features li {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 0.95rem;
      color: #94A3B8;
      margin-bottom: 0.85rem;
    }
    .consult-features li i {
      color: var(--accent);
    }
    .consult-form {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(8px);
      padding: 2.25rem;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.12);
    }
    .form-group {
      margin-bottom: 1.25rem;
    }
    .form-group label {
      display: block;
      font-size: 0.875rem;
      color: #CBD5E1;
      margin-bottom: 0.4rem;
      font-weight: 500;
    }
    .form-control {
      width: 100%;
      padding: 0.8rem 1rem;
      border-radius: var(--radius-sm);
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #FFFFFF;
      font-size: 0.925rem;
      outline: none;
      transition: border-color var(--transition-fast);
    }
    .form-control:focus {
      border-color: var(--accent);
    }
    .form-tip {
      font-size: 0.78rem;
      color: #94A3B8;
      margin-top: 1rem;
      text-align: center;
    }

    /* 底部固定转化条 (浮动挂件与手机吸底) */
    .floating-cta-bar {
      position: fixed;
      bottom: 20px;
      right: 24px;
      z-index: 999;
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }
    .float-btn {
      background: var(--secondary);
      color: #FFFFFF;
      padding: 0.8rem 1.4rem;
      border-radius: var(--radius-pill);
      font-size: 0.95rem;
      font-weight: 700;
      box-shadow: 0 10px 25px rgba(249, 115, 22, 0.4);
      display: flex;
      align-items: center;
      gap: 0.5rem;
      transition: all var(--transition-normal);
    }
    .float-btn:hover {
      background: var(--secondary-hover);
      transform: translateY(-3px);
      box-shadow: 0 14px 28px rgba(249, 115, 22, 0.5);
    }
    .back-to-top {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid rgba(255, 255, 255, 0.2);
      cursor: pointer;
      box-shadow: var(--shadow-md);
      transition: all var(--transition-fast);
    }
    .back-to-top:hover {
      background: var(--accent);
      transform: translateY(-2px);
    }

    /* 页脚 */
    .site-footer {
      background: #070A0F;
      color: #94A3B8;
      padding: 4.5rem 0 2rem 0;
      border-top: 1px solid var(--border-dark);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-brand h3 {
      color: #F8FAFC;
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 1.25rem;
    }
    .footer-col h4 {
      color: #F8FAFC;
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 0.75rem;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-contact li {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      margin-bottom: 0.85rem;
    }
    .footer-contact i {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
      font-size: 0.85rem;
    }
    .footer-bottom a:hover {
      color: var(--accent);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .arch-grid, .dark-flow-wrap, .consult-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
      }
      .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .compliance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-card:nth-child(2) {
        border-right: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 2rem 1.5rem;
        gap: 1.25rem;
        box-shadow: var(--shadow-xl);
        border-bottom: 1px solid var(--border-color);
        display: none;
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-actions {
        display: none;
      }
      .hero-content h1 {
        font-size: 2.15rem;
      }
      .highlights-grid, .features-grid, .suite-grid, .case-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .consult-box {
        padding: 2rem 1.5rem;
      }
      .floating-cta-bar {
        left: 12px;
        right: 12px;
        bottom: 12px;
      }
      .float-btn {
        flex-grow: 1;
        justify-content: center;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
    }

    @media (max-width: 520px) {
      .metrics-grid, .scenario-grid, .compliance-grid {
        grid-template-columns: 1fr;
      }
      .metric-card {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 1.5rem;
      }
      .metric-card:last-child {
        border-bottom: none;
      }
      .section {
        padding: 4rem 0;
      }
    }